iOS 的 Gif 渲染引擎 FLAnimatedImage-b
时间： 00:04:14
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标签：公司的项目有个首页加载一张2M左右的git图,刚做的时候是使用的SDWebImage里面的方法:
+ (UIImage *)sd_animatedGIFNamed:(NSString *)
+ (UIImage *)sd_animatedGIFWithData:(NSData *)
使用之后发现这个方法会使内存迅速上增300M,在网上找了一些方法:
//在didReceiveMemoryWarning方法中释放SDImage的缓存即可！
- (void)didReceiveMemoryWarning {
& & & &[superdidReceiveMemoryWarning];
& &// Dispose of & & any resources that can be recreated.
& & & &[[SDWebImageManagersharedManager]cancelAll];
& & & &[[SDImageCachesharedImageCache]clearDisk];
但是使用之后发现效果并不明显,于是使用了这个FLAnimatedImage
FLAnimatedImage 是 iOS 的一个渲染 Gif 动画的引擎。
可同时播放多个 Gif
&动画，速度媲美桌面浏览器
可变帧延迟
内存占用小
可在第一次循环播放时消除或者阻止延迟
动画的帧延迟解析性能媲美浏览器
示例代码：
FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://upload.wikimedia.org/wikipedia/commons/2/2c/Rotating_earth_%28large%29.gif"]]]; FLAnimatedImageView *imageView = [[FLAnimatedImageView alloc] init]; imageView.animatedImage = imageView.frame = CGRectMake(0.0, 0.0, 100.0, 100.0); [self.view addSubview:imageView];
&&国之画&&&& &&&&chrome插件
版权所有 京ICP备号-2
迷上了代码！iOS开发经验总结(二) - 风铃的翼的博客 - CSDN博客
iOS开发经验总结(二)
1、设置UILabel行间距
NSMutableAttributedString* attrString = [[NSMutableAttributedString
alloc] initWithString:label.text];
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
[style setLineSpacing:20];
[attrString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, label.text.length)];
label.attributedText = attrS
// 或者使用xib，看下gif图
Untitled.gif
2、当使用-performSelector:withObject:withObject:afterDelay:方法时，需要传入多参数问题
// 方法一、
// 把参数放进一个数组／字典，直接把数组／字典当成一个参数传过去，具体方法实现的地方再解析这个数组／字典
NSArray * array =
[NSArray arrayWithObjects: @”first”, @”second”, nil];
[self performSelector:@selector(fooFirstInput:) withObject: array afterDelay:15.0];
// 方法二、
// 使用NSInvocation
SEL aSelector = NSSelectorFromString(@”doSoming:argument2:”);
NSInteger argument1 = 10;
NSString *argument2 = @”argument2”;
if([self respondsToSelector:aSelector]) {
NSInvocation *inv = [NSInvocation invocationWithMethodSignature:[self methodSignatureForSelector:aSelector]];
[inv setSelector:aSelector];
[inv setTarget:self];
[inv setArgument:&(argument1) atIndex:2];
[inv setArgument:&(argument2) atIndex:3];
[inv performSelector:@selector(invoke) withObject:nil afterDelay:15.0];
3、UILabel显示不同颜色字体
NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:label.text];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0,5)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(5,6)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(11,5)];
label.attributedText =
4、比较两个CGRect/CGSize/CGPoint是否相等
if (CGRectEqualToRect(rect1, rect2)) { // 两个区域相等
// do some
if (CGPointEqualToPoint(point1, point2)) { // 两个点相等
// do some
if (CGSizeEqualToSize(size1, size2)) { // 两个size相等
// do some
5、比较两个NSDate相差多少小时
NSDate* date1 = someD
NSDate* date2 = someOtherD
NSTimeInterval distanceBetweenDates = [date1 timeIntervalSinceDate:date2];
double secondsInAnHour = 3600;
// 除以3600是把秒化成小时，除以60得到结果为相差的分钟数
NSInteger hoursBetweenDates = distanceBetweenDates / secondsInAnH
6、每个cell之间增加间距
// 方法一，每个分区只显示一行cell，分区头当作你想要的间距(注意，从数据源数组中取值的时候需要用indexPath.section而不是indexPath.row)
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
return yourArry.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
return cellSpacingH
// 方法二，在cell的contentView上加个稍微低一点的view，cell上原本的内容放在你的view上，而不是contentView上，这样能伪造出一个间距来。
// 方法三，自定义cell，重写setFrame：方法
- (void)setFrame:(CGRect)frame
frame.size.height -= 20;
[super setFrame:frame];
7、播放一张张连续的图片
// 加入现在有三张图片分别为animate_1、animate_2、animate_3
imageView.animationImages = @[[UIImage imageNamed:@”animate_1”], [UIImage imageNamed:@”animate_2”], [UIImage imageNamed:@”animate_3”]];
imageView.animationDuration = 1.0;
imageView.image = [UIImage animatedImageNamed:@”animate_” duration:1.0];
// 方法二解释下，这个方法会加载animate_为前缀的，后边0-1024，也就是animate_0、animate_1一直到animate_1024
8、加载gif图片
推荐使用这个框架 FLAnimatedImage
9、防止离屏渲染为image添加圆角
// image分类
- (UIImage *)circleImage
// NO代表透明
UIGraphicsBeginImageContextWithOptions(self.size, NO, 1);
// 获得上下文
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 添加一个圆
CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
// 方形变圆形
CGContextAddEllipseInRect(ctx, rect);
CGContextClip(ctx);
// 将图片画上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
10、查看系统所有字体
// 打印字体
for (id familyName in [UIFont familyNames]) {
NSLog(@”%@”, familyName);
for (id fontName in [UIFont fontNamesForFamilyName:familyName]) NSLog(@”
%@”, fontName);
// 也可以进入这个网址查看
11、获取随机数
NSInteger i = arc4random();
12、获取随机数小数(0-1之间)
define ARC4RANDOM_MAX
double val = ((double)arc4random() / ARC4RANDOM_MAX);
13、AVPlayer视频播放完成的通知监听
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(videoPlayEnd)
name:AVPlayerItemDidPlayToEndTimeNotification
object:nil];
14、判断两个rect是否有交叉
if (CGRectIntersectsRect(rect1, rect2)) {
15、判断一个字符串是否为数字
NSCharacterSet *notDigits = [[NSCharacterSet decimalDigitCharacterSet] invertedSet];
if ([str rangeOfCharacterFromSet:notDigits].location == NSNotFound)
// 不是数字
16、将一个view保存为pdf格式
(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
[aView.layer renderInContext:pdfContext];
UIGraphicsEndPDFContext();
NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString* documentDirectory = [documentDirectories objectAtIndex:0];
NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
[pdfData writeToFile:documentDirectoryFilename atomically:YES];
NSLog(@”documentDirectoryFileName: %@”,documentDirectoryFilename);
17、让一个view在父视图中心
child.center = [parent convertPoint:parent.center fromView:parent.superview];
18、获取当前导航控制器下前一个控制器
(UIViewController *)backViewController
NSInteger myIndex = [self.navigationController.viewControllers indexOfObject:self];
if ( myIndex != 0 && myIndex != NSNotFound ) {
return [self.navigationController.viewControllers objectAtIndex:myIndex-1];
19、保存UIImage到本地
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:@”Image.png”];
[UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES];
20、键盘上方增加工具栏
UIToolbar *keyboardDoneButtonView = [[UIToolbar alloc] init];
[keyboardDoneButtonView sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@”Done”
style:UIBarButtonItemStyleBordered target:self
action:@selector(doneClicked:)];
[keyboardDoneButtonView setItems:[NSArray arrayWithObjects:doneButton, nil]];
txtField.inputAccessoryView = keyboardDoneButtonV
21、copy一个view
因为UIView没有实现copy协议，因此找不到copyWithZone方法，使用copy的时候导致崩溃
但是我们可以通过归档再解档实现copy，这相当于对视图进行了一次深拷贝，代码如下
id copyOfView =
[NSKeyedUnarchiver unarchiveObjectWithData:[NSKeyedArchiver archivedDataWithRootObject:originalView]];
22、在image上绘制文字并生成新的image
UIFont *font = [UIFont boldSystemFontOfSize:12];
UIGraphicsBeginImageContext(image.size);
[image drawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
CGRect rect = CGRectMake(point.x, point.y, image.size.width, image.size.height);
[[UIColor whiteColor] set];
[text drawInRect:CGRectIntegral(rect) withFont:font];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
23、判断一个view是否为另一个view的子视图
// 如果myView是self.view本身，也会返回yes
BOOL isSubView = [myView isDescendantOfView:self.view];
24、判断一个字符串是否包含另一个字符串
// 方法一、这种方法只适用于iOS8之后，如果是配iOS8之前用方法二
if ([str containsString:otherStr]) NSLog(@”包含”);
NSRange range = [str rangeOfString:otherStr];
if (range.location != NSNotFound) NSLog(@”包含”);
25、UICollectionView自动滚动到某行
// 重写viewDidLayoutSubviews方法
-(void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
[self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionCenteredVertically animated:NO];
26、修改系统UIAlertController
// 但是据说这种方法会被App Store拒绝(慎用！)
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@”” message:@”” preferredStyle:UIAlertControllerStyleActionSheet];
NSMutableAttributedString *hogan = [[NSMutableAttributedString alloc] initWithString:@”我是一个大文本”];
[hogan addAttribute:NSFontAttributeName
value:[UIFont systemFontOfSize:30]
range:NSMakeRange(4, 1)];
[hogan addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(4, 1)];
[alertVC setValue:hogan forKey:@”attributedTitle”];
UIAlertAction *button = [UIAlertAction actionWithTitle:@"Label text" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ }];
UIImage *accessoryImage = [UIImage imageNamed:@"1"];
[button setValue:accessoryImage forKey:@"image"];
[alertVC addAction:button];
[self presentViewController:alertVC animated:YES completion:nil];
27、判断某一行的cell是否已经显示
CGRect cellRect = [tableView rectForRowAtIndexPath:indexPath];
BOOL completelyVisible = CGRectContainsRect(tableView.bounds, cellRect);
28、让导航控制器pop回指定的控制器
NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray:[self.navigationController viewControllers]];
for (UIViewController *aViewController in allViewControllers) {
if ([aViewController isKindOfClass:[RequiredViewController class]]) {
[self.navigationController popToViewController:aViewController animated:NO];
29、动画修改label上的文字
CATransition *animation = [CATransition animation];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.type = kCATransitionF
animation.duration = 0.75;
[self.label.layer addAnimation:animation forKey:@”kCATransitionFade”];
self.label.text = @”New”;
[UIView transitionWithView:self.label
duration:0.25f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
self.label.text = @"Well done!";
} completion:nil];
[UIView animateWithDuration:1.0
animations:^{
self.label.alpha = 0.0f;
self.label.text = @”newText”;
self.label.alpha = 1.0f;
30、判断字典中是否包含某个key值
if ([dic objectForKey:@”yourKey”]) {
NSLog(@”有这个值”);
NSLog(@”没有这个值”);
31、获取屏幕方向
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarO
if(orientation == 0) //Default orientation
else if(orientation == UIInterfaceOrientationPortrait)
else if(orientation == UIInterfaceOrientationLandscapeLeft)
else if(orientation == UIInterfaceOrientationLandscapeRight)
32、设置UIImage的透明度
// 方法一、添加UIImage分类
- (UIImage *)imageByApplyingAlpha:(CGFloat) alpha {
UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0f);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGRect area = CGRectMake(0, 0, self.size.width, self.size.height);
CGContextScaleCTM(ctx, 1, -1);
CGContextTranslateCTM(ctx, 0, -area.size.height);
CGContextSetBlendMode(ctx, kCGBlendModeMultiply);
CGContextSetAlpha(ctx, alpha);
CGContextDrawImage(ctx, area, self.CGImage);
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newI
// 方法二、如果没有奇葩需求，干脆用UIImageView设置透明度
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageWithName:@”yourImage”]];
imageView.alpha = 0.5;
33、Attempt to mutate immutable object with insertString:atIndex:
这个错是因为你拿字符串调用insertString:atIndex:方法的时候，调用对象不是NSMutableString，应该先转成这个类型再调用
34、UIWebView添加单击手势不响应
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(webViewClick)];
tap.delegate =
[_webView addGestureRecognizer:tap];
// 因为webView本身有一个单击手势，所以再添加会造成手势冲突，从而不响应。需要绑定手势代理，并实现下边的代理方法
- (BOOL)gestureRecognizer:(UIGestureRecognizer )gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer )otherGestureRecognizer{
return YES;
35、获取手机RAM容量
// 需要导入#import
pragma clang diagnostic ignored “-Wdeprecated-declarations”**
decoded = [[self alloc] initWithBase64Encoding:[string stringByReplacingOccurrencesOfString:@"[^A-Za-z0-9+/=]" withString:@"" options:NSRegularExpressionSearch range:NSMakeRange(0, [string length])]];
#pragma clang diagnostic pop
decoded = [[self alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];
return [decoded length]? decoded:
NSData转string
@param wrapWidth 换行长度
- (NSString *)base64EncodedStringWithWrapWidth:(NSUInteger)wrapWidth
if (![self length])
NSString *encoded =
#if __MAC_OS_X_VERSION_MIN_REQUIRED & __MAC_10_9 || __IPHONE_OS_VERSION_MIN_REQUIRED & __IPHONE_7_0
if (![NSData instancesRespondToSelector:@selector(base64EncodedStringWithOptions:)])
**#pragma clang diagnostic push
pragma clang diagnostic ignored “-Wdeprecated-declarations”**
encoded = [self base64Encoding];
#pragma clang diagnostic pop
switch (wrapWidth)
return [self base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
return [self base64EncodedStringWithOptions:NSDataBase64Encoding76CharacterLineLength];
encoded = [self base64EncodedStringWithOptions:(NSDataBase64EncodingOptions)0];
if (!wrapWidth || wrapWidth &= [encoded length])
wrapWidth = (wrapWidth / 4) * 4;
NSMutableString *result = [NSMutableString string];
for (NSUInteger i = 0; i & [encoded length]; i+= wrapWidth)
if (i + wrapWidth &= [encoded length])
[result appendString:[encoded substringFromIndex:i]];
[result appendString:[encoded substringWithRange:NSMakeRange(i, wrapWidth)]];
[result appendString:@”\r\n”];
NSData转string 换行长度默认64
- (NSString *)base64EncodedString
return [self base64EncodedStringWithWrapWidth:0];
63、AES加密
import “CALayer+BorderColor.h”
@implementation CALayer (BorderColor)
(void)setBorderUIColor:(UIColor *)color
self.borderColor = color.CGC
76、根据经纬度获取城市等信息
// 创建经纬度
CLLocation *location = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
//创建一个译码器
CLGeocoder *cLGeocoder = [[CLGeocoder alloc] init];
[cLGeocoder reverseGeocodeLocation:userLocation completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *place = [placemarks objectAtIndex:0];
　　NSLog(@”name,%@”,place.name);
　　// 街道
　　NSLog(@”thoroughfare,%@”,place.thoroughfare);
　　// 子街道
　　NSLog(@”subThoroughfare,%@”,place.subThoroughfare);
　　NSLog(@”locality,%@”,place.locality);
　　NSLog(@”subLocality,%@”,place.subLocality);
　　// 国家
　　NSLog(@”country,%@”,place.country);
CLPlacemark中属性含义
thoroughfare
subThoroughfare
街道相关信息，例如门牌等
subLocality
城市相关信息，例如标志性建筑
administrativeArea
subAdministrativeArea
其他行政区域信息（自治区等）
postalCode
ISOcountryCode
inlandWater
水源，湖泊
areasOfInterest
关联的或利益相关的地标
77、如何防止添加多个NSNotification观察者？
// 解决方案就是添加观察者之前先移除下这个观察者
[[NSNotificationCenter defaultCenter] removeObserver:observer name:name object:object];
[[NSNotificationCenter defaultCenter] addObserver:observer selector:selector name:name object:object];
78、将一个xib添加到另外一个xib上
// 假设你的自定义view名字为CustomView，你需要在CustomView.m中重写 - (instancetype)initWithCoder:(NSCoder *)aDecoder 方法，代码如下：
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
[self addSubview:[[[NSBundle mainBundle] loadNibNamed:@”CustomView” owner:self options:nil] objectAtIndex:0]];
将一个xib添加到另外一个xib上.png
79、处理字符串，使其首字母大写
NSString *str = @"abcdefghijklmn";
NSString *resultS
if (str && str.length & 0) {
resultStr = [str stringByReplacingCharactersInRange:NSMakeRange(0,1) withString:[[str substringToIndex:1] capitalizedString]];
NSLog(@"%@", resultStr);
80、判断一个UIAlertView/UIAlertController是否显示
// UIAlertView自带属性
if (alert.visible)
NSLog(@”显示了”);
NSLog(@”未显示”);
// UIAlertController没有visible属性，需要自己判断，添加一个全局变量 BOOL visible
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@”Title” message:@”message” preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction alertAction = [UIAlertAction actionWithTitle:@”ActionTitle” style:UIAlertActionStyleDefault handler:^(UIAlertAction
_Nonnull action) {
self.visible = NO;
UIAlertAction calcelAction = [UIAlertAction actionWithTitle:@”calcelTitle” style:UIAlertActionStyleCancel handler:^(UIAlertAction
_Nonnull action) {
self.visible = NO;
[alertController addAction:alertAction];
[alertController addAction:calcelAction];
[self presentViewController:alertController animated:YES completion:^{
self.visible = YES;
81、获取字符串中的数字
(NSString )getNumberFromStr:(NSString )str
NSCharacterSet *nonDigitCharacterSet = [[NSCharacterSet decimalDigitCharacterSet] invertedSet];
return [[str componentsSeparatedByCharactersInSet:nonDigitCharacterSet] componentsJoinedByString:@”“];
NSLog(@”%@”, [self getNumberFromStr:@”a0b0c1d2e3f4fda8fa8fad9fsad23”]); //
82、为UIView的某个方向添加边框
// 添加UIView分类
// UIView+WZB.h
import “UIView+WZB.h”
@implementation UIView (WZB)
(void)wzb_addBorder:(WZBBorderDirectionType)direction color:(UIColor *)color width:(CGFloat)width
CALayer *border = [CALayer layer];
border.backgroundColor = color.CGC
switch (direction) {
case WZBBorderDirectionTop:
border.frame = CGRectMake(0.0f, 0.0f, self.bounds.size.width, width);
case WZBBorderDirectionLeft:
border.frame = CGRectMake(0.0f, 0.0f, width, self.bounds.size.height);
case WZBBorderDirectionBottom:
border.frame = CGRectMake(0.0f, self.bounds.size.height - width, self.bounds.size.width, width);
case WZBBorderDirectionRight:
border.frame = CGRectMake(self.bounds.size.width - width, 0, width, self.bounds.size.height);
[self.layer addSublayer:border];
83、通过属性设置UISwitch、UIProgressView等控件的宽高
mySwitch.transform = CGAffineTransformMakeScale(5.0f, 5.0f);
progressView.transform = CGAffineTransformMakeScale(5.0f, 5.0f);
84、自动搜索功能，用户连续输入的时候不搜索，用户停止输入的时候自动搜索(我这里设置的是0.5s，可根据需求更改)
// 输入框文字改变的时候调用
-(void)searchBar:(UISearchBar )searchBar textDidChange:(NSString )searchText{
// 先取消调用搜索方法
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(searchNewResult) object:nil];
// 0.5秒后调用搜索方法
[self performSelector:@selector(searchNewResult) withObject:nil afterDelay:0.5];
85、修改UISearchBar的占位文字颜色
// 方法一（推荐使用）
UITextField *searchField = [searchBar valueForKey:@"_searchField"];
[searchField setValue:[UIColor blueColor] forKeyPath:@"_placeholderLabel.textColor"];
// 方法二（已过期）
[[UILabel appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:[UIColor redColor]];
// 方法三（已过期）
NSDictionary *placeholderAttributes = @{NSForegroundColorAttributeName : [UIColor redColor], NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue" size:15],};
NSAttributedString *attributedPlaceholder = [[NSAttributedString alloc] initWithString:searchBar.placeholder attributes:placeholderAttributes];
[[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setAttributedPlaceholder:attributedPlaceholder];
86、某个界面多个事件同时响应引起的问题(比如，两个button同时按push到新界面，两个都会响应，可能导致push重叠)
// UIView有个属性叫做exclusiveTouch，设置为YES后，其响应事件会和其他view互斥(有其他view事件响应的时候点击它不起作用)
view.exclusiveTouch = YES;
// 一个一个设置太麻烦了，可以全局设置
[[UIView appearance] setExclusiveTouch:YES];
// 或者只设置button
[[UIButton appearance] setExclusiveTouch:YES];
87、修改tabBar的frame
// 子类化UITabBarViewController，我这里以修改tabBar高度为例，重写viewWillLayoutSubviews方法
import “WZBTabBarViewController.h”
@interface WZBTabBarViewController ()
@implementation WZBTabBarViewController
- (void)viewWillLayoutSubviews {
CGRect tabFrame = self.tabBar.
tabFrame.size.height = 100;
tabFrame.origin.y = self.view.frame.size.height - 100;
self.tabBar.frame = tabF
88、修改键盘背景颜色
// 设置某个键盘颜色
textField.keyboardAppearance = UIKeyboardAppearanceA
// 设置工程中所有键盘颜色
[[UITextField appearance] setKeyboardAppearance:UIKeyboardAppearanceAlert];
89、修改image颜色
UIImage *image = [UIImage imageNamed:@”test”];
imageView.image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextClipToMask(context, rect, image.CGImage);
CGContextSetFillColorWithColor(context, [[UIColor redColor] CGColor]);
CGContextFillRect(context, rect);
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImage *flippedImage = [UIImage imageWithCGImage:img.CGImage scale:1.0 orientation: UIImageOrientationDownMirrored];
imageView.image = flippedI
90、动画执行removeFromSuperview
[UIView animateWithDuration:0.2
animations:^{
view.alpha = 0.0f;
} completion:^(BOOL finished){
[view removeFromSuperview];
91、设置UIButton高亮背景颜色
[UIView animateWithDuration:0.2
animations:^{
view.alpha = 0.0f;
} completion:^(BOOL finished){
[view removeFromSuperview];
92、设置UIButton高亮时的背景颜色
// 方法一、子类化UIButton，重写setHighlighted:方法，代码如下
import “WZBButton.h”
@implementation WZBButton
(void)setHighlighted:(BOOL)highlighted {
[super setHighlighted:highlighted];
UIColor *normalColor = [UIColor greenColor];
UIColor *highlightedColor = [UIColor redColor];
self.backgroundColor = highlighted ? highlightedColor : normalC
// 方法二、利用setBackgroundImage:forState:方法
[button setBackgroundImage:[self imageWithColor:[UIColor blueColor]] forState:UIControlStateHighlighted];
(UIImage )imageWithColor:(UIColor )color {
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
93、关于图片拉伸
推荐看这个博客，讲的很详细http://blog.csdn.net/qq/article/details/8615661
94、利用runtime获取一个类所有属性
(NSArray *)allPropertyNames:(Class)aClass
objc_property_t *properties = class_copyPropertyList(aClass, &count);
NSMutableArray *rv = [NSMutableArray array];
for (i = 0; i & i++)
objc_property_t property = properties[i];
NSString *name = [NSString stringWithUTF8String:property_getName(property)];
[rv addObject:name];
free(properties);
95、设置textView的某段文字变成其他颜色
(void)setupTextView:(UITextView )textView text:(NSString )text color:(UIColor *)color {
NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:textView.text];
[string addAttribute:NSForegroundColorAttributeName value:color range:[textView.text rangeOfString:text]];
[textView setAttributedText:string];
96、让push跳转动画像modal跳转动画那样效果(从下往上推上来)
(void)push
TestViewController *vc = [[TestViewController alloc] init];
vc.view.backgroundColor = [UIColor redColor];
CATransition* transition = [CATransition animation];
transition.duration = 0.4f;
transition.type = kCATransitionMoveIn;
transition.subtype = kCATransitionFromT
[self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
[self.navigationController pushViewController:vc animated:NO];
CATransition* transition = [CATransition animation];
transition.duration = 0.4f;
transition.type = kCATransitionR
transition.subtype = kCATransitionFromB
[self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
[self.navigationController popViewControllerAnimated:NO];
97、上传图片太大，压缩图片
-(UIImage )resizeImage:(UIImage )image
float actualHeight = image.size.
float actualWidth = image.size.
float maxHeight = 300.0;
float maxWidth = 400.0;
float imgRatio = actualWidth/actualH
float maxRatio = maxWidth/maxH
float compressionQuality = 0.5;//50 percent compression
if (actualHeight & maxHeight || actualWidth & maxWidth)
if(imgRatio & maxRatio)
//adjust width according to maxHeight
imgRatio = maxHeight / actualH
actualWidth = imgRatio * actualW
actualHeight = maxH
else if(imgRatio & maxRatio)
//adjust height according to maxWidth
imgRatio = maxWidth / actualW
actualHeight = imgRatio * actualH
actualWidth = maxW
actualHeight = maxH
actualWidth = maxW
CGRect rect = CGRectMake(0.0, 0.0, actualWidth, actualHeight);
UIGraphicsBeginImageContext(rect.size);
[image drawInRect:rect];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
NSData *imageData = UIImageJPEGRepresentation(img, compressionQuality);
UIGraphicsEndImageContext();
return [UIImage imageWithData:imageData];
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